Aligning jig



Dec. 25 1923.

L. C. THORNTON ALIGNING JIG Filed Aug. 22 1922 INVENTOR AOXLA 6. Tuomvra/v TTON'EY Patented Dec. 255, 1923.

LOXLA o. THORNTON, or rnnsno, CALIFORNIA.

ALIGNING JIG.

Application filed August 22, 1922. Serial No. 583,648.

To aZZ whom it may concern:

Be it known that I, LOXLA C. THORNTON, a citizen of the United States, and resident of Fresno, in the county of Fresno, State of California, have invented certain new and useful Improvements in Aligning Jigs, of which the following is a specification.

My invention relates primarily to a jig for aligning or truing pistons and connecting rods, and the object thereof is to provide a device of this character provided with a plurality of quickly interchangeable arbors of the various sizes to suit the size crank shaft or bearing in the connecting rod.

Another object is to provide in a device of the above character means for insuring the correct positioning of the arbor right angularly to the aligning or truing face of the ji Other objects and advantages will appear hereinafter and, while I have shown and will describe the preferred form of my device, I wish it to be distinctly understood that I do not limit myself to such preferred form but that various changes and adaptations may be made therein without departing from the spirit of my invention.

In the drawings accompanying and forming a part hereof:

Fig. 1 is a side elevation of my ig ready for use. I

Fig. 2 is a front elevation of Fig. 1.

Fig. 8 is a central cross section through a fragment of my jig with parts in elevation.

Fig. 4 is a central longitudinal sectional view, partly in elevation, of one of the arbors used with my jig.

Referring to the drawings, my device comprises a body member composed of a base 6, adapted to be mounted upon a bench or table, by bolts or otherwise. Extending upwardly from one side of base 6 is a Wall 7 the upper end of which supports a face plate 8. Extending rearwardly from wall 7, near the edges thereof, are ribs 9 and 10 which extend downwardly and then rearwardly and terminate at the rear edge of base 6. Cross partitions or webs 11 and'12 connect ribs 9 and 10, ribs 9 and 10 and webs 11 and 12 being provided to insure the proper rigidity and strength. Extending rearwardly from wall 7, near the lower end thereof, is a hub 13 provided with a central aperture 14 extending therethrough. Loosely mounted within aperture 14 is a spindle 15 the free end 16 of which is threaded for threaded engagement with the interior opening 17 of the arbor 18. The other end of spindle 15 terminates in a knurled hand wheel 19 by means of which spindle 15 may be manually rotated. The inner end of. arbor-18 is provided with an enlarged portion 20, the face 21 of which is adapted to bear against the face of wall 7. It will be understood that in producing my device the face of wall 7 and face plate 8 will be iin ished in exact alignment and that face 21 will be finished at an exact right angle to the periphery of arbor 18, so that as spindle 15 is tightened face 21 is drawn up against the face of wall 7, spindle 15 being sufficiently loose in hole 14; to permit arbor 18 to adjust itself to a correct right angle to the face of wall 7 and face plate 8. When it is desired to substitute one size of arbor for another, wheel 19 will be used to unscrew spindle 15. from engagement with the interior threaded opening 17 of the arbor, when the same may be removed and a new arbor substituted therefor.

In the use of my device the parts will be in the positions shown, it being understood that the arbor of the proper size is positioned upon the end of spindle 15. The crank shaft opening of the connecting rod will then be positioned upon the arbor 18 and by aligning the skirt of the pistons with the wall of face plate 8 any variation in alignment will be quickly noticed and by means of a wrench or other suitable tool the connecting rod may be twisted or bent in the desired direction to bring the same into proper alignment without removing the same from the arbor 18.

Having described my invention what I claim is:

1. An aligning jig comprising a base; an upstanding wall on one edge of said base; a face plate on the upper end of said wall; a hub extending rearwardly from said wall intermediate its length; a spindle loosely mounted in said hub having one end threaded and its other end terminating in a knurled hand wheel; and an arbor mounted on the end of said spindle in screw threaded engagement therewith.

2. An aligning jig for pistons and connectin rods comprising a base adapted to be secured to a fixed support; a wall extending upwardly from one edge of said base and terminating at its other end in a face plate; ahubcarriedby said Wall intermedi-,

thereto; a spindle loosely mounted in. said hub, centrally thereof, having one end.

threaded and terminating at its other end in aknurled head; an arbor mounted onthe threaded end of said spindle, the inner face of said arbor and said Wall and" faceplate:

being so constructed and arranged that When positioned foruse a perfect right angle is formed between the face of said face plate and the outer periphery of: said arbor.

3. An aligning jiga'fonipistonsand cone, neeting rods comprising a base; a Wall extending upwardly fromfl one edge of said base-"at right angles thereto terminating .at itsnppen end in, face plate, the face of saidwva-ll and said face plate being-parallel;

nemeeo a hub carried by said Wall intermediate its lengthmand extending at right angles thereto; a spindle loosely mounted in said hub having one end threaded and terminating at its other end in a knurled head, the threaded to be drawn'tobear against 'thefaoe ofsaid:

Wall: when positioned forjuse.

In WitllBSStllZlt I claim the forego-ingrl have hereunto set my hand this 21st day of w July, 1922.

LOXLA o. THORNTON; 

